Generally speaking, the lack of ventilation in the nose will not cause premature beats, and the causes of premature beats include vegetative nerve disorders, coronary heart disease, digitalis drugs and so on. 1. Vegetative nerve disorders: If we exclude organic lesions of the heart, vegetative nerve dysfunction, resulting in excessive sympathetic nerve excitation, premature beats will occur, usually manifested as panic, elevated blood pressure, accelerated respiration, and so on. 2. Coronary artery disease: If coronary artery disease patients are emotionally excited, drinking, stress, will induce premature ventricular contractions, myocardial cells ischemia, so that myocardial oxygen consumption increases, panic, accompanied by dizziness, chest tightness, shortness of breath and so on. 3. Digitalis drugs: If poisoning occurs during the use of digitalis drugs, causing cardiotoxic reaction, digitalis can contract the myocardium, shorten the effective response period of the myocardium, which will lead to premature ventricular contractions, often manifested as nausea, diarrhea, headache, visual changes, oliguria and so on. Generally the nose is not ventilated will not cause premature beats, if the situation of premature beats should be timely medical treatment, under the formal guidance of the doctor for treatment.